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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Gemology is the science dealing with natural and artificial gems and gemstones and investigates some of the most beautiful naturally occurring objects on our planet. Explore the world of quartz and all its varieties, such as onyx, jasper, amethyst, tiger's eye, smoky quartz, and the gorgeous lapis lazuli. Learn about precious stones like the diamond, ruby, sapphire, and emerald. Project Webster represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Project Webster continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge.